On 6/25/05 at 1:56 AM, mbekkali at gmail.com (Mukhtar Bekkali) wrote:
>How do you pull the solution out from Reduce? That is, with Solve I
>can have x=x/.Solve[f[x]==0,x] and get x and use it later on. The
>output of Reduce is identity, x==number.
Keep in mind x==number is an expression which can be manipulated with other Mathematica functions.
Specifically, note
FullForm[Reduce[x + 1 == 0, x]]
results in
Equal[x, -1]
So, the -1 can be extracted using Apply as follows:
Last[List@@Reduce[x + 1, x]]
or even more directly with Part as
Reduce[x + 1 == 0, x][[2]]
or
Part[Reduce[x +1 == 0, x], 2]
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